Exhaust-nozzle



(No Model.) 3 Sheets-Sheet 1.

s. A'. LIVINGSTON-.- EXHAUST NozzLB.

Noi-1 514;944-1 Patentd Peb. zo, 1894.

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(No Model.) 3 Sheets-Sheet 2. S. A. LIVINGST01\I.v

EXHAUST NOZZLE.

' No.514,'944. Patented Feb. 2o, 1894.

(No Model.) 3 Sheets-Sheet 3 S. A. LIVINGSTON. EXHAUST NOZZLE.

No. 514,944. Patented`Feb. 20, 1894.

UNITED STATESr PATENT OFFICE. Y'

SAMUEL A. LIVINGSTON, OF BROOKLYN, NEWV YORK.

i EXHAUST-NOZZLE.

SPECIFICATION forming part of Letters Patent No. 514,944, dated-February 20, 1894.

- Application tiled December 5, 1893. Serial No. 492,839. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL A. LIVINGSTON, a citizen of the UnitedStates, residing at- Brooklyn, in the county of Kings and State of NewYork, have invented certain new and useful Improvements inExhaust-Nozzles; and I do hereby declare that the following is a full,clear, and exact description of the invention,

which will enable others skilled in the art to which it appertains tomake and use the same. My invention relates to exhaust mechanism to beapplied to the exhaust nozzle of such steam engines wherein the exhaustis caused to produce a blast in the chimney or smokestack and therebyaccelerate the draft of the furnace to which the chimney is attached. Itis particularly to be usedl on locomotives, portable and tractionengines, marine engines or other engines where'the exhaust blast must berelied upon to produce a rapid draft of the air through the furnace. Inengines of this kind it has been found that after the fire has reachedan intense heat, owing to the blast, it is necessary to open the furnacedoor to admit a large volume of cold air above the grate tocheck thedraft when the engine is stopped or slowed, to prevent the steampressure becomingexcessive and dangerous, owing tothe decreasedconsumption of the steam at such time. This opening of the furnace doorproduces great strains on the boiler dueto the cooling and rapidcontraction of the boiler parts, and often produces dangerous cracks yinthe crown sheets and tire-box.

lThe object of my invention is to provide improved means for regulatingthe exhaust' blast, so as to keep the fire under control at all timesirrespective of the speed ofthe engine and the rapidity of the exhaust,and my invention consists in the mechanism particularly described inthis specificationahd shown in the accompanying drawings forming a partthereof and in which- Figure l, is a perspective view of my invention asapplied to a locomotive, parts thereof being broken away to more clearlyshow the device in its operative location. Fig. 2, is a vertical sectiontaken on the line 2 2 of Fig. 3. Fig. 3 is a sectional plan taken online 3 3 of Fig. 2. Fig. et is a plan view of a detail part. Fig. 5 is asectional view of a modication; and Fig. 6 is a plan of the same.

by the same reference letter.

D is the blast pipe into which the two or 5 5 more exhaust pipes orpassages from the one or more engine cylinders lead;` it is dividedcentrally into two'or more compartments by means of a partition E, thusproviding two or more passageways, one for each of the two 6o or `morecylinder exhausts,and this partition or bridge performs another functionas will be pointed out later on. Mounted upon D is the nozzle A whichhas no partition, but which is provided with a number of guides B whichhave vertical edges extending a short distance inwardly. Upon the guidesB there slides a blast cone, or blast accelerator 0. The upper portionof the nozzle A is provided with an inner ange F 7o the lower face G ofwhich constitutes a seat for a corresponding Ilange H upon the cone 0,when the cone is raised up to it. I are guide ways or grooves cut intoflange H of the cone and continued along the body of the same. Theseguide-ways fit over and slide upon the guides B of the nozzle. J J aretwo lugs secured to, or made integralwith cone C and to which theraising and lowering mechanism of the cone is at- 8c tach-ed. Thisraising and lowering mechanism may be of various forms, but thepreferred form which I have shown herein consists of the elbow lever Kpivoted at L between two lugs M on nozzle AF This 8 5 elbow lever isconnected by a link N to a rocker arm O attached toa rock-shaft Ppassing through the smoke-box and provided outside thereof with an arm Qto which is attached the rod R leading to the engig'o neers cab.

The modification of my device shown in Fig. 5, is such as is preferredfor use with compound locomotives or compound enginesA genv erally, inwhich owing to the greatly increased volume of steam and low pressure ofexhaust, it may benecessary to accelerate the furnace draft. In thiscase, the webs or In all the views the same part is designated guides BVare reduced in depth and the body of cone C is provided with an annu-[oo lar valve ring U joined to the main body by webs Vj this ring actsas a valve to cover ports or openings W located in the casing A in suchposition as to be wholly covered by U when the cone is seated against G.The ports W may be of any number and may have any form desired. When thecone is lowered the steam will find a free outlet as indicated by arrowsS and T and will also draw in air or furnace gases through the ports Wand discharge them as indicated by the arrow, Y.

The operation of my device is as followsz When the engine is workingunder normal conditions and the full effect of the exhaust blast isrequired to produce a draft for the furnace, the engineer has pulled therod R so as to lift the cone C so that the upper surface or seat offlange Il thereof seatsitself against the under surface or seat offlange F on nozzle A. Under these circumstances all the exhaust steam ofthe cylinders will be obliged to pass through the contracted inneropening of the cone C as indicated byarrow S thus producinga very sharpand effective blast. Should the fires become too hot, generate toomuchsteam, or should the engineer anticipate a stoppage, or slow down,when too much steam would be generated for the consumption of the enginehe will lower the cone C as shown in Fig. 2. This being done the steamwill no longer be forced to pass through the contracted cone area alone,but will pass partly through the cone as shown by arrowS, but will alsopass through the annular passage surrounding the cone, as indicated byarrow T. In this manner a free exhaust is produced from the cylinder andthe draft or blast is immediately checked without the necessity ofopening the furnace door. It by any means the cone G should becomedetached from its raising and lowering mechanism it will fall upon thebridge E and be retained thereby from falling into the exhaust passageof the engine and the guides B will secure it in position to prevent itsbecoming jammed in the nozzle.

When my mechanism is applied to a single cylinder engine the part E neednot be a web, but merely a bridge piece or a flange upon which the coneC may rest when detached from its raising and lowering mechanism and thenozzle A must be attached directly to the exhaust passage thus doingaway with the blast pipe D which is used in locomotives to giveheightonly to the cone.

I am aware that it is not new to control the exhaust or blast pipes of'locomotive and kindred engines, but

What I claim as new, and desire to secure by Letters Patent, is-

l. In a steam boiler, the combination with an engine exhaust passage, ablast pipe connected thereto and located in the uptake or chimney ofsaid boiler, of au exhaust nozzle mounted on said blast pipe and havingan inner flange at the top, a hollow open cone located in said nozzleand provided with an exterior flange adapted to seat upon the blast pipeflange, and means for raising and lowering said cone to bring saidflanges into and out of contact, substantially as described.

2. The combination of a steam boiler smoke outlet, with a steam engineexhaust outlet, a blast nozzle attached thereto having an inwardlyextending flange,afhollow open, conical blast accelerator located withinthe nozzle and provided with an exterior flange at the base of theconical part, guides for keeping the accelerator in proper relation tothe nozzle, and means for raising and lowering the accelerator so as tocontract or expand the outlet of said nozzle, substantially asdescribed.

3. The combination of a steam boiler smoke outlet with a steam engineexhaust outlet, a blast nozzle secured thereto having an inwardlyextendingflange, a hollow open accelerator located within said nozzleand provided with an exterior flange at the base of the conical part, toexpand or contract its outlet, guides to keep the accelerator centralwithin the nozzle, a step or bridge-piece in the exhaust outlet, andmeans for raising and lowering the accelerator, substantially asdescribed.

4. A blast nozzle for locomotive and other boiler furnaces consisting ofthe combination of a casing attached to the exhaust pipe of a steamengine, a hollow open ended blast cone centrally located thereinprovided with an outer flange adapted to seat against an inner ledge ofsaid casing a concentric ring connected to said cone by open distancepieces and adapted to act as a valve to cover open ings in the casingwhen the cone is in a raised position and means for raising and loweringthe cone, substantially as described.

5. In combination with the smoke-outlet of a steam boiler of an exhaustoutlet for a steam engine, an exhaust nozzle attached thereto andlocated so as to produce a blast in said smoke outlet consisting of anouter casing A having an upper ledge G of an inner cone C provided withla flange H adapted to seat against ledge G, a valve ring U attached tothe body of cone C by means of distance pieces and adapted to coveropenings W in casing A when the cone is raised and flange II is seatedon ledge G and to uncover said openings when the cone is lowered withmeans for raising and lowering the cone, substantially as described.

6. A blast device for a furnace, consisting of the combination of anozzle attached to an engine exhaust passage provided with a main outletwith an inner hollow open ended blast cone, serving to contract orexpand said outlet, of au auxiliary valve attached to the said coneadapted to expand and contract auxiliary outlet openings in said nozzleand means for raising and lowering the cone to contract and expand saidmain and auxiliary nozzle openings, substantially as described.

SAMUEL A. LIVINGSTON.

Witnesses:

ARCHI). MCLEAN, GEO. R. FERGUSON.

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